Socket-wrench



R. MITCHELL.

SOCKET WRENCH.

APPLICATION FILED cor. a, 19m.

Patented July 13, 1920.

UNITED STATES ROY MITCHELL, or Elvin,

Pa; E a'r OFFICE.

socKE'r-wRENcfi. I

Application filed October 8, 1917. Serial No. 195,405.

To all whom it may concern:

Be it known that I, ROY MIT HELL, a citizen of the United States,residing at Enid, county of Garfield, State of Oklahoma, have inventedcertain new and useful Improvements in Socketrenches, of which thefollowing is a specification.

The present invention relates to tools, and has particular reference tothat type known as wrenches.

The object of the present invention is to provide an. improved type ofsocket wrench adapted more-particularly for use in restricted placessuch as on Ford cars and like 'mechanisms; to provide a relativelystrong and simply constructed wrench which is capable of transmittingconsiderable pressure from the hand to the nut or bolt head to which thewrench may be applied; and a wrench which comprises relatively few partswhich may be economically constructed and assembled.

The above and various other objects and advantages of this inventionwill be in part described and in part understood from the followingdetailed description of the present preferred embodiment, the same beingillustrated in the accompanying drawing, wherein Figure 1 is aperspective view of a wrench constructed according'to the presentinvention.

Fig. 2 is a longitudinal section through the gear case taken immediatelybeneath the outer cover plate.

Fig. 3 is a longitudinal transverse section v of the gear case and partscarried thereby.

Referring to the drawing 10 designates a socket or head of considerablesize and internal configuration to embrace a nut or bolt head or thelike having external angularly disposed faces. The socket 10 has uponits inner end a shank 11 preferably angular in cross-section and at thebase of the shank is provided with an enlarged circular bearing 12adapted to fit in a correspondingly formed aperture in a cover plate 13which closes a gear casing or body part 14. A relatively large gearwheel 15 is placed in the casing and has a central opening therethroughin cross-section to that of the shank 11, and through which the shankprojects for causing a simultaneous turning of the gear wheel and thesocket. The socket shank projects beyond the gear wheel 15 and has areduced bearing surface 16 fitting in an aperture formed in the bottomof the gear case 14. The said shank is further provided with a reducedscrew threaded stem 17pro ect1ng from the bottom of the axial openingtherethrough receiving the corresponding formed shank 21 of a crankbrace 22. The crank brace 22 projects from the casing in an oppositedirection or side from that which the socket 10 projects. A collar 23 issweated or otherwise suitably fixed upon the crank brace 22 near itsouter end and is adapted to bear against the bottom of the casing 14.Immediately adjacent the collar 23 is a cylindrical bearing portion 24fitting in a correspondingly formed open- 1ng 1n the bottom of thecasing and which lies immediately adjacent the shank 21. The outer endof the shank 21 hasa reduced cylindrical bearing portion 25 fitted in acorrespondingly formed aperture in the cover plate 13. The shank 21terminates at its outer end in a reduced screw threaded stem 26 uponwhich is mounted the washer 27 and a retaining nut 28.

The pinion'20 is connected to the gear wheel 15 by an idler pinion 29arranged intermediately in the casing. The idler is mounted upon abearing pin 30 in the form of a bolt having a head 31 engaging againstthe bottom of the gear case 14 and having a cylindrical intermediateportion traversing the casing and forming a support for the idlerpinion. The opposite end of the pin 30 has a reduced threaded'stem 32receiving thereon a washer 33 bearing against the outer side of thecover and held thereagainstv by a nut 34 which is also mounted on thestem 32.

' The use of the device is apparent for the socket end of the casing 14may be inserted. in a relatively narrow space and the socket '10 appliedto the nut or bolt head located in the case. The crank brace 22 is ofsufficient length to clearany usual obstructions between the gear-caseand the crank portion facilitating the turning of the crank brace byhand. The sides of the casing 14 serve as a hand hold or, in otherwords, to receive the thumb and index finger of the operator steady whengrasping the wrench to place the socket 10 over a nut or bolt head andalso to the wrench when the other hand is rotating the crank brace, withthe .knob 35' against the breast of the workman.

The casing 14 is provided at its open side with lateral lugs 36 adaptedto enter correspondingl'y formed notches provided in the lateral edgesof the cover 13 to anchor the same in position and retain it fromedgewise displacements.

It isof course understood that various changes and modifications may bemade in the details of constructions of and design of the abovespecificallydescribed parts of this invention without departing from thespirit thereof, such changes and modifications being restricted only bythe scope of the followin claims.

claim:

1. A socket wrench comprising a brace in the form of a crank having anon-circular shank portion, a driving gear fitted to said non-circularshank portion, a driven gear having a non-circular central opening, anutreceivmgsocket having a shank provided with a non-circular portionarranged in and conforming to said non-circular opening, an intermediategear meshing with said driving gear and driven gear, a gear casecomprising an elongated wall member having a marginal flange surroundingall of said gears and an elongated cover plate seated on the edge ofsaid marginal flangeto'form a wall member'for the gear case, said edgeof ,the marginal flange having lugs and the cover plate having notchesin which said lugs are mounted to prevent edgewise displacement ofthecover plate, the shanks of said brace and socket being rotatablymounted in the wall members of said gear case. I

2. A socket wrench comprising'a brace in the; form of a crank having anon-clrcular shank portion, a driving gear fitted to said non-circularshank portion, a driven gear having a non-circular central opening, anutrecei-ving socket having a shank provided with a non-circular portionarranged in and conforming to said non-circular opening, an intermediategear meshing with said driving gear and driven gear, a gear casecomprising an elongated wall member having a marginal flange surroundingall of said gears I ing portion rotatably mounted in the last mentionedwall member and a relatively small cylindrical bearing portion locatedin the other wall member, said shank of the brace terminating in areduced screw 'thread- 1 ed stem, a nut mounted on said stem andcooperating with said'collar to secure the elongated cover plate,saidshank of the nutreceiving socket having an enlarged cylindricalbearing portion mounted in one of said wall members, a reduced bearingportion mounted in the other wall member and V a relatively smallthreaded stem extending from said reduced bearing portion, a nut on thelast mentioned stem, a bearing pin in the form of a bolt extendingthrough said intermediate gear, said bearing pin having a head engagingone wall member of the gear case and a reduced threaded stemextendingthrough the other wall member, and

a nut arranged on the last mentioned stem and cooperating-with said headto secure elements of the gear case. Y

' ROY MITCHELL.

